宫内节育器(IUD)是最常用的节育措施,自从IUD问世以来,就普遍采用了X射线对金属节育器进行检查。尽管城镇多用B超代替X射线检查[1],但广大农村仍主要用荧光屏透视进行节育器检查。由于“T”型和花型节育器金属含量少,以及女性体胖者增多,使节育器检查的漏诊、误诊时有发生。1　 Intrauterine devices (IUDs) are the most commonly used methods of birth control. Since the advent of IUDs, X-rays have been used to examine metallic IUDs. Although urban use of B ultrasound instead of X-ray examination [1], but the vast majority of rural areas are still mainly used fluoroscopic fluoroscopy examination. Due to the “T” type and IUD metal content is small, as well as female body fat increase, so that IUD missed diagnosis, misdiagnosis have occurred. 1